Merge pull request #77 from matrefeytontias/master

Various fixes and enhancements for the color kernel
Update docs for colorRectangle
Merge pull request #79 from matrefeytontias/master

Added DEMulBC, setLcdWindow and improved randA
Fix kcall for 0xED prefixes
Merge branch 'master' of github.com:KnightOS/kernel
Add clipping to getPixel and fix divACbyDE
Fix build error and disable timer 2
Rename "rleSentinel" to "runIndicator"
Implement pcall
Make sure interrupt check is accurate in pcall
Moved all maths routines out of util.asm in math.asm